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SixLabors Licensing and IronPDF

Curtis Chau
Curtis Chau
Updated: August 21, 2026

IronPDF depends on SixLabors NuGet packages, and SixLabors changed its licensing model across versions. You do not need to take any action to stay compliant; IronPDF already handles it.

SixLabors Commercial License

You do not need to separately comply with the SixLabors commercial license. The 3.x.x SixLabors versions that support later .NET releases carry a commercial license, but IronPDF already covers this on your behalf. No additional licensing action is required on your end.

License on .NET Framework

For the versions that support .NET Framework, SixLabors continues to use the Apache license.

Apache-Licensed Version Support

The 2.x.x Apache-licensed versions remain supported. SixLabors still makes bug-fix releases available for them.

NuGet package listing for SixLabors.ImageSharp showing version history for both the 3.x.x and 2.x.x release lines

Curtis Chau
Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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C# NuGet Library for PDF
Install with NuGet

Version: 2026.9

PM > Install-Package IronPdf
nuget.org/packages/IronPdf/
  1. In Solution Explorer, right-click References, Manage NuGet Packages
  2. Select Browse and search "IronPdf"
  3. Select the package and install
C# PDF DLL
Download DLL

Version: 2026.9

or download Windows Installer here.

  1. Download and unzip IronPDF to a location such as ~/Libs within your Solution directory
  2. In Visual Studio Solution Explorer, right click References. Select Browse, "IronPdf.dll"

Licenses from $999